Valve mechanism for internal-combustion engines.



E. i. TUNE VALVE AAECHANISN EUR lN''E-NAl CUNNUSTION ENGINES.

APPLICATION FILED? SEPT. 16' 15H6.

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FRED I. TONE, OF lNDlFl'lFUlllfS, lfldlDlflltlld.

.application tiled September 16, i916.

for operating the valves and at the same time inspiring the correct seating of the valves without danger of injury to the operating means; to provide means for guiding the valve stems in their reciprocating 'niovemenh to provide common equaliaing means between said operating means and a pair of valves and to provide a construe tion adapted to obtain the above endswhlch shall be capable of being mounted above the cylinder head..

llll'ith these objects in view, my invention is embodied in preferable form in the con struction' and arrangement hereinafter described and illustrated in the accompanying ln these drawings Figure l is a central vertical section through a valve head and a part of an engine cylinder; Fig. 2, is a vertical section on line 2 2 of Fig. l, and

3, a top plan view. lteferring to the drawings, l is an engine cylinder of the usual type and 2 is a head mounted above said cylinder. head are adapted to be mounted vertically reciprocable exhaust valves Ll, and similar iii-tahe valves, (not shown). ln Fig. l, the valves there shown are both exhaust valves, a pair of such valves being preferably em ployed for each cylinder. `Firtending upwardly from the horizontal head plate o are guides t* which are provided with. ver

'tical angle arms 'l'. VlChese-guides have open ings fi in which the valve rods reciprocate and by which they are guided. dgainst these' arms 'l are adapted tobear similarly shaped arms l@ which are connected by upper and lower cross bars 'll and la, said parts forming together one -member of a sliding frame which is adapted to vertically reciprocate on the arms 7.; 'lfwo similar frame members are provided and they are t adapted to be joined and held against the lined bracket angle arms by means of up- Specication of Letters Paten-t.

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per and lower adjusting bolts or pins 13 and ld. rllhe upper cross bar l1 comprises two arch shaped upwardly extending arms, carried by each member of the sliding frame and the bolt 13 passes through the junction of these arms. Un this bolt are mounted two upper rollers l5 which are adapted to bear against female cams lo, mounted on a cam shaft ll' which may be ope'ated in any suitable manner. Mounted on the lower bolt ll is a single roller it which is adapted .to bear against and be operated by a male cam 19 also mounted on the cam shaft i7.

llivoted on the bolt 13 is a valve operating presser member or tappet having two arms 20 and 2l which are curved upwardly and the outer ends of which bear against the upper ends of the stems 22, of the valves l. 'l`his member is common to both valves of the pair, and it has an equalizing action owing to its pivotal mounting. rlhe arm 20 is provided with an adjustable screw 2l inserted in a split soc-liet and.

adapted to bear against the end of the valve stem and the screw ,is adapted to be loclred in its socket after adjustment, by a clamping screw 25. rlFhe arms 20 and 2l serveto force the valves downward to open the same when the sliding frame lUnll-l carried downward.

l ln order to lift the valves so as to carry them against 'their seats a lifter member 2G provided which consists of a horizontal, freely movable bar which 1s arch-shaped and jaivotally engages the bolt lfd, and is provided with aperturcd circular ends @l surrounding the respective valve stems. Fach end is formed with an annular groove to receive a spiral spring surrounding the valve stem and the other end of which spring bears against an inverted cup-shaped dislr 29 which is held in place on the stem `by a split spring washer or other suitable means. @wing to its central pivotal mounting the lifter bar 2t likewise has an equalising action against the valve stems, through the springs.

-"lfhe pair of intalre valves for each cylinderis operated by mechanism similar tol that above described and by cams on the same cam shaft lil.

ln the operation of the mechanism, the cam shaft l'l being driven by any suitable means, in the rotation thereof the cam l@ will ride against the roller l@ and carry the frame llt-ll downward,the arms "ld slid lll@ lilla l. l. il

' ing onand being guided by the fixed vertical arms 7 As the frame moves downward it will carry the ends of the arms 2O and 21 against the upper ends of the valve stems thus vforcing the valves downward and uncovering the ports. The valves are moved out to their eXtreme distance from their' seats when the highest point of the cambears against the roller, and as such highest part thereof passes out' of engagement with its roller, the raised part of the cams 16 will begin to engage the rollers l5, and such rollers will be then raised, lifting the frame 10-11, and carrying the lifter bar 26 against the springs 28, lifting the valve rods through the springs.

Since the springs 28 move with the frame, they will. merely serve to provide a cushioning eect in the slight relative equalizing for repair or replacement.' The valves although driven in one direction through the springs are operated by' positively driven mechanism, in both their opening and closing movements, while at the same time they are cushioned .while being seated.

rIhe reeiprocable valve operating iframe is guided effectively by the vertical brackets and is also adjustable laterally. The frame may be readily adjusted relatively to the `brackets by means of the bolts 13 and 14,

and thev angle faces of the brackets and frame.

Having thus described my invention, what I claim is':

1. In an internal combustion engine, in combination with a plurality of valves, positively driven means for operating said valves to both open and close the same, springs between said operating means and said valves through which the valves are driven to close the same, a common equalizing member between said valves and said operating means, and means for pivotally mounting said equalizing member.-

2. In an internal combustion engine, a pair ofvalves, a sliding frame common to said valves for reciprocating the same, cams for bearing on said frame'for raising and lowering the same to open and close the valves, means for driving said cams, said cams being mounted between the upper and lower endsof the valve stems and between the stems of the respective valves.

3. In an internal combustion engine, in combination with a reciprocable valve and its stem, a sliding valve operating frame, means for driving said frame,`and a fixed guide member adapted. to serve as a guide for both said frame and said valve stem 'in the movements or" the same.

4. In an internal combustion engine, in combination with an explosion cylinder, a pair of valves and their valve stems, a head above the cylinder in which said valves and their stems are mounted, 'hollow standards through which said valve stems project. a vertically reciprocable frame slidably mounted on said standards and adapted to be guided thereby, means of operative con nection betwccnsaid frame and said valve stems, and operating cams located below the upper ends of the valve stems and between said stems for imparting movement to said frame.

5. In an internal combustion engine. in combination with a pair of valves, a sliding frame common to the stems of both valves for effecting movementV o the same to both open and close the valves, said frame having two pivoted equalizing contact members adapted to engage the valve stems near the upper ends of the latter for operating said stems, a common center for said members, driven rollers for the frame mounted on said center and lifting and lowering cams mounted below said rollers, and a roller carried by the` fra-me -below said cams.

In witness whereof, I have hereunto set my hand and seal at Indianapolis, Indiana, this 13th day of September, A. D. nineteeen hundred and sixteen.

FRED r. TONE. [L aj 

